diff --git a/package/wireshark/wireshark.mk b/package/wireshark/wireshark.mk
index f7cc8f8424..593b19645e 100644
--- a/package/wireshark/wireshark.mk
+++ b/package/wireshark/wireshark.mk
@@ -78,7 +78,7 @@ WIRESHARK_CONF_OPTS += --with-gnutls=no
 endif
 
 ifeq ($(BR2_PACKAGE_LIBGCRYPT),y)
-WIRESHARK_CONF_ENV = LIBGCRYPT_CONFIG=$(STAGING_DIR)/usr/bin/libgcrypt-config
+WIRESHARK_CONF_ENV += LIBGCRYPT_CONFIG=$(STAGING_DIR)/usr/bin/libgcrypt-config
 WIRESHARK_CONF_OPTS += --with-gcrypt=yes
 WIRESHARK_DEPENDENCIES += libgcrypt
 else